EP0489655A1 - Indoline-spiro-benzoxazine photochromic compounds and process for their preparation - Google Patents

Indoline-spiro-benzoxazine photochromic compounds and process for their preparation Download PDF

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EP0489655A1
EP0489655A1 EP91403280A EP91403280A EP0489655A1 EP 0489655 A1 EP0489655 A1 EP 0489655A1 EP 91403280 A EP91403280 A EP 91403280A EP 91403280 A EP91403280 A EP 91403280A EP 0489655 A1 EP0489655 A1 EP 0489655A1
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group
alkyl
compounds according
phenyl
photochromic
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EP0489655B1 (en
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Robert Guglielmetti
Pascale Tardieu
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EssilorLuxottica SA
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Essilor International Compagnie Generale dOptique SA
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    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00Optical elements other than lenses
    • G02B5/20Filters
    • G02B5/22Absorbing filters
    • G02B5/23Photochromic filters
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D498/00Heterocyclic compounds containing in the condensed system at least one hetero ring having nitrogen and oxygen atoms as the only ring hetero atoms
    • C07D498/12Heterocyclic compounds containing in the condensed system at least one hetero ring having nitrogen and oxygen atoms as the only ring hetero atoms in which the condensed system contains three hetero rings
    • C07D498/20Spiro-condensed systems

Definitions

  • the subject of the present invention is new compounds which are of the indolino-spiro-oxazine type and which have useful photochromic properties. It also relates to a process for the preparation of these compounds, as well as their industrial applications as photochromic additives, in particular in the manufacture of transparent photochromic articles.
  • the preferred photochromic compounds of the invention comprise, in group A, a triazolo ring. They advantageously present the general formula: or R6 is a hydrogen atom, a phenyl, an alkyl radical, in particular an alkyl radical containing from 1 to 5 carbon atoms, R1 is an alkyl radical, in particular an alkyl radical containing from 1 to 8 carbon atoms, such as in particular that the methyl and isopropyl groups, R2 and R3 can be each and independently one of the other any of the conventional substituents in the indolino-spiro-benzoxazine compounds of the prior art, in particular an alkyl or alkoxy radical containing from 1 to 5 carbon atoms.
  • the phenyl groups included respectively in the indoline part and in the oxazine part of the molecule may also each contain one or more substituents of any type which is not disruptive for the essential properties of the compound.
  • the diazene cycle of the molecule include a proton, that is to say in particular that R6 is a hydrogen atom in formula II.
  • the compounds of the invention can be obtained by a preparation process exploiting synthesis methods in themselves known, which comprises a stage of condensation of an indolinic base III on a nitroso-hydroxy-heteroaromatic compound IV, according to the scheme :
  • the intermediate compound (IV) can be obtained beforehand by hydrolysis of an appropriate derivative which is thus converted into the corresponding hydroxy derivative, then nitrosation of the latter.
  • the suitable hydroxy derivative can itself be obtained from para-aminophenol by successive stages of acetylation, nitration, catalytic reduction transforming NO2 into NH2, and condensation to form the triazolic cycle.
  • the 5-acetoxy-1-acetyl benzotriazole obtained at this stage can be deacetylated by hydrolysis in a strong acid medium to lead to the 5-hydroxy benzotriazole sought for nitrosation.
  • the compounds according to the present invention can be dissolved in a suitable solvent such as toluene or ethanol in order to obtain a photochromic solution.
  • a suitable solvent such as toluene or ethanol
  • photochromic compounds can also be dissolved in a polymer, a copolymer or a mixture of polymers in solution in a suitable organic solvent.
  • compositions according to the present invention which can be applied or introduced into or onto a transparent organic polymer material in order to obtain a transparent photochromic article.
  • this material is an optical quality material, more particularly a material suitable for the manufacture of ophthalmic lenses.
  • photochromic compositions which are also the subject of the present invention which can be used directly in the constitution of photochromic plastic films, of plates and of lenses such as lenses for sunglasses, viewfinders, camera optics and filters.
  • compositions suitable, in accordance with the invention, for the manufacture of transparent photochromic materials and articles comprise one or more of the photochromic compounds of the present invention in combination with one or more of the following polymers: polymer of a polyolallylcarbonate monomer, poly-acrylate, polyalkyl-acrylates such as polymethyl methacrylate (PMMA), cellulose acetate, cellulose triacetate, cellulose propiono and butyro-acetate, polyvinyl acetate, polyvinyl alcohol, polyurethanes, polycarbonates, polyethyleneterephthalate, polystyrene, copolymers of styrene and methyl methacrylate, acrylonitrile, polyvinylbutyral.
  • polymers polymer of a polyolallylcarbonate monomer, poly-acrylate, polyalkyl-acrylates such as polymethyl methacrylate (PMMA), cellulose acetate, cellulose triacetate, cellulose propiono and butyro-acetate, poly
  • the amount of photochromic compound (or composition containing this compound) applied or introduced onto or into the polymeric material is not of critical importance and it generally depends on the intensity of color desired under irradiation and on the method used to incorporate or apply the photochromic compound.
  • the latter can be chosen from among the numerous methods applicable to photochromic compounds of the prior art, including in particular the dissolution or dispersion of the compound in the basic composition of the material, or the production of a photochromic layer on the surface or at the surface. inside a transparent support material.
  • the more photochromic compound is added the more coloration under irradiation will be important.
  • Such an amount can be described as a photochromic amount.
  • the amount of photochromic compound incorporated into the optical material is from 0.01 to 20% by weight, and preferably from 0.05 to 10% by weight, relative to the total weight of optical material.
  • Photochromic effects are thus obtained, which result in the appearance of a coloration under exposure to radiation belonging to the UV field, with return to color or transparency. original when the exposure to UV radiation is interrupted This change in color can be repeated a very large number of times, as is required for sun protection glasses. In addition, the coloring persists throughout the time of exposure to solar radiation better than in the case of photochromic compounds of the prior art.
  • reaction mixture is then maintained at a temperature between 12 and 15 ° C, then poured over crushed ice (hydrolysis).
  • the bright yellow solid which precipitates is collected and recrystallized from ethanol. It is analyzed by nuclear magnetic resonance and by infrared spectrometry in solution in chloroform.
  • a mixture comprising 2.38 g of 4-acetoxy-1-acetylamino-2-nitro-benzene obtained (O, O1 mole), 6 ml of cyclohexene, palladium on carbon 10% (in catalytic amount) in 20 ml of ethanol , is brought to reflux under a hydrogen atmosphere overnight.
  • Example II The same procedure is applied as in Example II to cause the condensation of the product of Example I with the indolin base isopropyl-1 methylene-2 dimethyl-3.3 indoline.
  • the technique used proceeds by flash photolysis and makes it possible to record the absorption spectrum of the open form (photomerocyanine) in the 400-650 nm zone, as well as its evolution over time.
  • Ao maximum optical density after photolysis
  • K ⁇ kinetic constant of discoloration (expressed in s ⁇ 1), as well as the wavelengths ⁇ e at the shoulder and ⁇ max at the maximum of absorption, expressed in nanometers.
  • the compound according to the invention has an absorption spectrum of its open form exhibiting marked sensitivity to its environment, in particular here the solvent.
  • the maximum absorption Ao corresponds, in apolar mediums to short wavelengths and vice versa in polar mediums (in particular dipolar aprotic).
  • Such a phenomenon can find applications in the field of information storage (computer memories, optical discs).

Abstract

New photochromic compounds from the class of indolinospirooxazines, characterised in that they have the formula of an indolinospirobenzocyclodiazene (for example formula (I)).

Description

La présente invention a pour objet des composés nouveaux qui sont du type indolino-spiro-oxazine et qui présentent des propriétés photochromiques utiles. Elle concerne également un procédé de préparation de ces composés, ainsi que leurs applications industrielles en tant qu'additifs photochromiques, notamment dans la fabrication d'articles transparents photochromiques.The subject of the present invention is new compounds which are of the indolino-spiro-oxazine type and which have useful photochromic properties. It also relates to a process for the preparation of these compounds, as well as their industrial applications as photochromic additives, in particular in the manufacture of transparent photochromic articles.

On connait déjà divers composés photochromiques appartenant à la famille chimique des spiro-oxazines, y compris parmi ceux qui présentent la formule d'une indolino-spiro-benzoxazine, soit :

Figure imgb0001

où R¹ est un radical alkyle et les noyaux indoline et oxazine peuvent porter des substituants variés, notamment des radicaux alkyle inférieur (comportant de 1 à 5 atomes de carbone) qui ne perturbent pas leurs propriétés essentielles.We already know various photochromic compounds belonging to the chemical family of spiro-oxazines, including among those which have the formula of an indolino-spiro-benzoxazine, namely:
Figure imgb0001

where R¹ is an alkyl radical and the indoline and oxazine rings can carry various substituents, in particular lower alkyl radicals (containing from 1 to 5 carbon atoms) which do not disturb their essential properties.

Cependant, il reste un grand besoin de trouver des perfectionnements aux techniques de fabrication des composés photochromiques et de découvrir des composés nouveaux, dans lesquels on recherche des propriétés spécifiques, différentes de celles des composés déjà connus.However, there remains a great need to find improvements in the techniques for manufacturing photochromic compounds and to discover new compounds, in which specific properties are sought, which are different from those of the compounds already known.

Si l'on considère en particulier le domaine de la fabrication des verres ou lentilles organiques, propres à se colorer en lumière solaire, il est intéressant de disposer d'une vaste gamme d'additifs photochromiques, différant les uns des autres par exemple par leurs propriétés de compatibilité avec telle ou telle résine organique, par le spectre d'absorption de la forme colorée, etc., tout en respectant au mieux d'autres impératifs tels que la rapidité de coloration et décoloration, la stabilité chimique, la résistance à des conditions d'emploi impliquant dans le temps un grand nombre de séquences de coloration et décoloration et l'insensibilité à des variations de température.If we consider in particular the field of the manufacture of organic glasses or lenses, suitable for coloring in sunlight, it is advantageous to have a wide range of photochromic additives, differing from each other for example by their properties of compatibility with such or such organic resin, by the absorption spectrum of the colored form, etc., while at the same time respecting other requirements such as the speed of coloring and discoloration, chemical stability, resistance to conditions of use involving over time a large number of coloring and discoloration sequences and insensitivity to temperature variations.

Les composés suivant l'invention sont des indolino-spiro-benzocyclodiazènes, c'est-à-dire des composés répondant à la formule I dans laquelle le groupement A comporte un cycle à liaison diazène -N=N-, de préférence dans un cycle à cinq chaînons triaza orthocondensé sur un cycle aromatique. Ils se distinguent en cela d'autres composés proposés dans l'art antérieur, en particulier de ceux où le groupement A, orthocondensé sur le noyau benzénique de la partie oxazine de la molécule, est un hétérocycle azoté aromatique parmi ceux divulgués par le brevet américain US 4 720 547, ou de ceux où ce groupement A est de type benzofurane comme dans la demande de brevet européen 0 358 774.The compounds according to the invention are indolino-spiro-benzocyclodiazenes, that is to say compounds corresponding to formula I in which group A comprises a diazene-linked ring -N = N-, preferably in a ring five-membered orthocondensed triaza on an aromatic cycle. They differ in this from other compounds proposed in the prior art, in particular from those in which the group A, orthocondensed on the benzene nucleus of the oxazine part of the molecule, is an aromatic nitrogen heterocycle among those disclosed by the American patent. US 4,720,547, or those in which this group A is of the benzofuran type as in European patent application 0 358 774.

Les composés photochromiques préférés de l'invention comportent en groupement A un cycle triazolo. Ils présentent avantageusement la formule générale :

Figure imgb0002


R⁶ est un atome d'hydrogène, un phényle, un radical alkyle, notamment un radical alkyle comportant de 1 à 5 atomes de carbone,
R¹ est un radical alkyle, notamment un radical alkyle comportant de 1 à 8 atomes de carbone, tel en particulier que les groupes méthyle et isopropyle,
R² et R³ peuvent être chacun et indépendamment l'un de l'autre l'un quelconque des substituants classiques dans les composés indolino-spiro-benzoxazine de l'art antérieur, en particulier un radical alkyle ou alkoxy comportant de 1 à 5 atomes de carbone.The preferred photochromic compounds of the invention comprise, in group A, a triazolo ring. They advantageously present the general formula:
Figure imgb0002

or
R⁶ is a hydrogen atom, a phenyl, an alkyl radical, in particular an alkyl radical containing from 1 to 5 carbon atoms,
R¹ is an alkyl radical, in particular an alkyl radical containing from 1 to 8 carbon atoms, such as in particular that the methyl and isopropyl groups,
R² and R³ can be each and independently one of the other any of the conventional substituents in the indolino-spiro-benzoxazine compounds of the prior art, in particular an alkyl or alkoxy radical containing from 1 to 5 carbon atoms.

Les groupes phényle compris respectivement dans la partie indoline et dans la partie oxazine de la molécule peuvent également comporter chacun un ou plusieurs substituants de tout type non perturbateur pour les propriétés essentielles du composé.The phenyl groups included respectively in the indoline part and in the oxazine part of the molecule may also each contain one or more substituents of any type which is not disruptive for the essential properties of the compound.

L'invention s'étend donc notamment aux homologues des composés de la formule (II) où :
R¹ représente

  • i) un groupe alkyle de 1 à 16 atomes de carbone tel qu'un groupe méthyle, éthyle, n-propyle, isopropyle, n-butyle ;
  • ii) un groupe allyle, phényle, arylalkyle tel qu'un groupe benzyle, phényle mono et di-substitué par des substituants du type alkyle ou alkoxy de 1 à 6 atomes de carbone ;
  • iii) un groupe alicyclique tel qu'un groupe cyclohexyle, éventuellement substitué ;
  • iv) un groupe hydrocarbure aliphatique comportant dans sa chaîne un ou plusieurs hétéroatomes tels que O, N ou S, notamment une fonction acide, ester ou alcool ;
    R² et R³ peuvent chacun et indépendamment l'un de l'autre représenter un groupe C₁₋₈ alkyle, phényle, phényle mono et disubstitué par des groupes C₁₋₄ alkyle et/ou C₁₋₅ alkoxy ou peuvent être combinés pour former une chaîne cyclique de 6 à 8 atomes de carbone (incluant le carbone spirannique 3 l'hétérocycle indolinique) ;
The invention therefore extends in particular to homologs of the compounds of formula (II) where:
R¹ represents
  • i) an alkyl group of 1 to 16 carbon atoms such as a methyl, ethyl, n-propyl, isopropyl, n-butyl group;
  • ii) an allyl, phenyl, arylalkyl group such as a benzyl, phenyl group mono and di-substituted by substituents of the alkyl or alkoxy type of 1 to 6 carbon atoms;
  • iii) an alicyclic group such as an optionally substituted cyclohexyl group;
  • iv) an aliphatic hydrocarbon group comprising in its chain one or more heteroatoms such as O, N or S, in particular an acid, ester or alcohol function;
    R² and R³ may each independently of one another represent a C₁₋₈ alkyl, phenyl, phenyl group mono and disubstituted by C₁₋₄ alkyl and / or C₁₋₅ alkoxy groups or may be combined to form a chain cyclic from 6 to 8 carbon atoms (including the spiranic carbon 3 the indolinic heterocycle);

En désignant par R⁴ les quatre substituants possibles sur le noyau benzénique de la partie indolinique de la molécule et par R⁵ les deux substituants possibles du noyau benzénique de la partie oxazinique, de manière générale R⁴ et R⁵ peuvent chacun et indépendamment l'un de l'autre représenter :

  • i) un atome d'hydrogène, une fonction amine NR′R˝, où R′ et R˝ représentent chacun et indépendamment un atome d'hydrogène, un groupe alkyle, cycloalkyle, phényle ou un dérivé substitué de celui-ci ; R′ et R˝ peuvent se combiner pour former un cycloalkyle pouvant être substitué et contenir un ou plusieurs hétéroatomes ;
  • ii) un groupe R, OR, SR, COR ou COOR dans lequel R représente un atome d'hydrogène, un groupe alkyle de 1 à 6 atomes de carbone ou un groupe aryle ou hétéroaryle ;
  • iii) un atome d'halogène, un groupe C₁₋₄ monohaloalkyle, un groupe C₁₋₄ polyhaloalkyle tel que CF₃, l'halogène étant notamment Cl, Br ;
  • iv)-NO₂, CN, SCN ;
    chacun des substituants R⁴ pouvant être présent sur l'un quelconque des atomes de carbone convenables de la partie indoline du composé photochromique, en position 4, 5, 6 et 7 quand l'autre est un atome d'hydrogène, alors qu'il est préférable que deux substituants autres qu'un atome d'hydrogène soient présents en positions 4 et 5, 5 et 6, 4 et 6 ou 6 et 7.
By designating by R⁴ the four possible substituents on the benzene nucleus of the indolinic part of the molecule and by R⁵ the two possible substituents of the benzene nucleus of the oxazine part, generally R⁴ and R⁵ can each and independently one of the other represent:
  • i) a hydrogen atom, an amine function NR′R˝, where R ′ and R˝ each independently represent a hydrogen atom, an alkyl, cycloalkyl, phenyl group or a substituted derivative thereof; R ′ and R˝ may combine to form a cycloalkyl which may be substituted and contain one or more heteroatoms;
  • ii) a group R, OR, SR, COR or COOR in which R represents a hydrogen atom, an alkyl group of 1 to 6 carbon atoms or an aryl or heteroaryl group;
  • iii) a halogen atom, a C₁₋₄ monohaloalkyl group, a C₁₋₄ polyhaloalkyl group such as CF₃, the halogen being in particular Cl, Br;
  • iv) -NO₂, CN, SCN;
    each of the substituents R⁴ possibly being present on any one of the suitable carbon atoms of the indoline part of the photochromic compound, in position 4, 5, 6 and 7 when the other is a hydrogen atom, while it is preferable that two substituents other than a hydrogen atom are present in positions 4 and 5, 5 and 6, 4 and 6 or 6 and 7.

De préférence :

  • R¹ est un groupe C₁₋₄ alkyle, phényle ou benzyle ;
  • R² et R³ sont choisis parmi les groupes C₁₋₅ alkyle tels que méthyle et éthyle ou un groupe phényle, ou sont combinés pour former un groupe cyclohexyle ;
  • chacun des groupes R⁴ est choisi parmi le groupe constitué par hydrogène, C₁₋₂ alkyle, chlore, fluor, brome, iode, C₁₋₂ trihaloalkyle et C₁₋₅ alkoxy ;
  • et R⁵ est un atome d'hydrogène ou un groupe C₁₋₄ alkoxy ou une amine tertiaire ou un halogène.
Preferably:
  • R¹ is a C₁₋₄ alkyl, phenyl or benzyl group;
  • R² and R³ are chosen from C₁₋₅ alkyl groups such as methyl and ethyl or a phenyl group, or are combined to form a cyclohexyl group;
  • each of the groups R⁴ is chosen from the group consisting of hydrogen, C₁₋₂ alkyl, chlorine, fluorine, bromine, iodine, C₁₋₂ trihaloalkyle and C₁₋₅ alkoxy;
  • and R⁵ is a hydrogen atom or a C₁₋₄ alkoxy group or a tertiary amine or a halogen.

Parmi les composés selon l'invention sont particulièrement intéressants les composés dans lesquels :

  • R¹ est un groupe C₁₋₄ alkyle tel que méthyle, éthyle, isopropyle ou n-butyle ;
  • R² et R³ représentent chacun et indépendamment l'un de l'autre un groupe méthyle, éthyle ou phényle ;
  • R⁴ est un atome d'hydrogène, un groupe méthyle, méthoxy ou chloro ;
  • et R⁵ est un atome d'hydrogène.
Among the compounds according to the invention, the compounds in which:
  • R¹ is a C₁₋₄ alkyl group such as methyl, ethyl, isopropyl or n-butyl;
  • R² and R³ each represent, independently of one another, a methyl, ethyl or phenyl group;
  • R⁴ is a hydrogen atom, a methyl, methoxy or chloro group;
  • and R⁵ is a hydrogen atom.

Parmi d'autres applications privilégiées des composés de l'invention, il convient de citer spécialement l'emploi des additifs photochromiques dans la fabrication de disques d'enregistrement d'informations optiques tels que ceux que l'on appelle couramment disques laser.Among other preferred applications of the compounds of the invention, special mention should be made of the use of photochromic additives in the manufacture of discs for recording optical information such as those commonly called laser discs.

Dans ce cas, il est souhaitable que le cycle diazène de la molécule comporte un proton, c'est-à-dire notamment que R⁶ soit un atome d'hydrogène dans la formule II.In this case, it is desirable that the diazene cycle of the molecule include a proton, that is to say in particular that R⁶ is a hydrogen atom in formula II.

Par ailleurs, on a pu constater que l'on a souvent avantage à utiliser des composés dans lesquels la partie indolinique de la molécule comporte un substituant nitro, de préférence en position 5 du groupement indoline. En particulier la colorabilité photochromique est sensiblement augmentée lorsque dans la formule II, le substituant R⁴ est NO₂.Furthermore, it has been observed that it is often advantageous to use compounds in which the indolinic part of the molecule contains a nitro substituent, preferably in position 5 of the indoline group. In particular, the photochromic colorability is appreciably increased when in formula II, the substituent R⁴ is NO₂.

Les composés de l'invention peuvent être obtenus par un procédé de préparation exploitant des méthodes de synthèse en elles-même connues, qui comporte une étape de condensation d'une base indolinique III sur un composé nitroso-hydroxy-hétéroaromatique IV, suivant le schéma :

Figure imgb0003
The compounds of the invention can be obtained by a preparation process exploiting synthesis methods in themselves known, which comprises a stage of condensation of an indolinic base III on a nitroso-hydroxy-heteroaromatic compound IV, according to the scheme :
Figure imgb0003

Le composé intermédiaire (IV) peut être préalablement obtenu par hydrolyse d'un dérivé approprié que l'on convertit ainsi en dérivé hydroxy correspondant, puis nitrosation de ce dernier. Le dérivé hydroxy convenable peut lui-même être obtenu à partir du para-aminophénol par des étapes successives d'acétylation, nitration, réduction catalytique transformant NO₂ en NH₂, et condensation pour former le cycle triazolique. L'acétoxy-5 acétyl-1 benzotriazole obtenu à ce stade peut être désacétylé par hydrolyse en milieu d'acide fort pour conduire à l'hydroxy-5 benzotriazole recherché pour nitrosation.The intermediate compound (IV) can be obtained beforehand by hydrolysis of an appropriate derivative which is thus converted into the corresponding hydroxy derivative, then nitrosation of the latter. The suitable hydroxy derivative can itself be obtained from para-aminophenol by successive stages of acetylation, nitration, catalytic reduction transforming NO₂ into NH₂, and condensation to form the triazolic cycle. The 5-acetoxy-1-acetyl benzotriazole obtained at this stage can be deacetylated by hydrolysis in a strong acid medium to lead to the 5-hydroxy benzotriazole sought for nitrosation.

Dans leur mise en oeuvre pour la préparation de compositions photochromiques, les composés selon la présente invention peuvent être dissous dans un solvant convenable tel que le toluène ou l'éthanol afin d'obtenir une solution photochromique. Ces mêmes composés photochromiques peuvent également être dissous au sein d'un polymère, d'un copolymère ou d'un mélange de polymères en solution dans un solvant organique convenable.In their use for the preparation of photochromic compositions, the compounds according to the present invention can be dissolved in a suitable solvent such as toluene or ethanol in order to obtain a photochromic solution. These same photochromic compounds can also be dissolved in a polymer, a copolymer or a mixture of polymers in solution in a suitable organic solvent.

Ils entrent ainsi dans la constitution de compositions selon la présente invention, qui peuvent être appliquées ou introduites dans ou sur un matériau polymère organique transparent pour obtenir un article transparent photochromique. Préférentiellement, ce matériau est un matériau de qualité optique, plus particulièrement un matériau convenable pour la fabrication de lentilles ophtalmiques.They thus form part of the composition of compositions according to the present invention, which can be applied or introduced into or onto a transparent organic polymer material in order to obtain a transparent photochromic article. Preferably, this material is an optical quality material, more particularly a material suitable for the manufacture of ophthalmic lenses.

Ils peuvent aussi entrer dans des compositions photochromiques faisant également l'objet de la présente invention qui peuvent être utilisées directement dans la constitution de films plastiques photochromiques, de plaques et de lentilles telles que des lentilles pour lunettes de soleil, viseurs, optiques de caméra et filtres.They can also enter into photochromic compositions which are also the subject of the present invention which can be used directly in the constitution of photochromic plastic films, of plates and of lenses such as lenses for sunglasses, viewfinders, camera optics and filters.

Des exemples de compositions appropriées, conformément à l'invention, pour la fabrication de matériaux et articles transparents photochromiques, comportent un ou plusieurs des composés photochromiques de la présente invention en combinaison avec un ou plusieurs des polymères suivants :
polymère d'un monomère de polyolallylcarbonate, poly-acrylate, polyalkyl-acrylates tels que le polyméthacrylate de méthyle (PMMA), acétate de cellulose, triacétate de cellulose, propiono et butyro-acétate de cellulose, acétate de polyvinyle, alcool polyvinylique, polyuréthanes, polycarbonates, polyéthylènetéréphtalate, polystyrène, copolymères de styrène et de méthacrylate de méthyle, acrylonitrile, polyvinylbutyral.
Examples of compositions suitable, in accordance with the invention, for the manufacture of transparent photochromic materials and articles, comprise one or more of the photochromic compounds of the present invention in combination with one or more of the following polymers:
polymer of a polyolallylcarbonate monomer, poly-acrylate, polyalkyl-acrylates such as polymethyl methacrylate (PMMA), cellulose acetate, cellulose triacetate, cellulose propiono and butyro-acetate, polyvinyl acetate, polyvinyl alcohol, polyurethanes, polycarbonates, polyethyleneterephthalate, polystyrene, copolymers of styrene and methyl methacrylate, acrylonitrile, polyvinylbutyral.

La quantité de composé photochromique (ou de composition contenant ce composé) appliquée ou introduite sur ou dans le matériau polymère n'est pas d'importance critique et elle dépend généralement de l'intensité de couleur désirée sous irradiation et de la méthode utilisée pour incorporer ou appliquer le composé photochromique. Cette dernière peut être choisie parmi les nombreuses méthodes applicables aux composés photochromiques de l'art antérieur, parmi lesquelles notamment la dissolution ou la dispersion du composé dans la composition de base du matériau, ou la réalisation d'une couche photochromique en surface ou à l'intérieur d'un matériau support transparent.The amount of photochromic compound (or composition containing this compound) applied or introduced onto or into the polymeric material is not of critical importance and it generally depends on the intensity of color desired under irradiation and on the method used to incorporate or apply the photochromic compound. The latter can be chosen from among the numerous methods applicable to photochromic compounds of the prior art, including in particular the dissolution or dispersion of the compound in the basic composition of the material, or the production of a photochromic layer on the surface or at the surface. inside a transparent support material.

D'une manière générale, plus on ajoute de composé photochromique, plus la coloration sous irradiation sera importante. Une telle quantité peut être décrite comme une quantité photochromique. De façon usuelle, la quantité de composé photochromique incorporée au matériau optique est de 0,01 à 20 % en poids, et préférentiellement de 0,05 à 10 % en poids, par rapport au poids total de matériau optique.In general, the more photochromic compound is added, the more coloration under irradiation will be important. Such an amount can be described as a photochromic amount. Usually, the amount of photochromic compound incorporated into the optical material is from 0.01 to 20% by weight, and preferably from 0.05 to 10% by weight, relative to the total weight of optical material.

On obtient ainsi des effets photochromiques qui se traduisent par l'apparition d'une coloration sous exposition à des radiations appartenant au domaine de l'U.V., avec retour à la couleur ou la transparence originelle lorsqu'on interrompt l'exposition aux radiations U.V. Ce changement de coloration peut se renouveler un très grand nombre de fois, comme il est demandé pour des lunettes de protection solaire. De plus, la coloration persiste pendant tout le temps de l'exposition au rayonnement solaire mieux que dans le cas des composés photochromiques de l'art antérieur.Photochromic effects are thus obtained, which result in the appearance of a coloration under exposure to radiation belonging to the UV field, with return to color or transparency. original when the exposure to UV radiation is interrupted This change in color can be repeated a very large number of times, as is required for sun protection glasses. In addition, the coloring persists throughout the time of exposure to solar radiation better than in the case of photochromic compounds of the prior art.

L'invention sera maintenant plus complètement illustrée au moyen d'exemples particuliers de mise en oeuvre non limitatifs.The invention will now be more fully illustrated by means of specific non-limiting examples of implementation.

EXEMPLE IEXAMPLE I SYNTHESE DU TRIMETHYL-INDOLINO-SPIROBENZOTRIAZOLE-OXAZINESYNTHESIS OF TRIMETHYL-INDOLINO-SPIROBENZOTRIAZOLE-OXAZINE 1) Synthèse de l'hydroxy-5 nitroso-4 benzotriazole1) Synthesis of 5-hydroxy-4-nitroso benzotriazole Acétoxy-4 acétylamino-1 benzène4-acetoxy-1-acetylamino benzene

A une solution agitée de 0,05 mole de p-aminophénol dans 50 ml de NaOH (3M), on ajoute rapidement 15 ml d'anhydride acétique et 5 à 10 g de glace pilée. Une agitation vigoureuse est maintenue pendant quelque minutes. Un précipité beige apparaît qui est recueilli et purifié si nécessaire par chromatographie (éluant CHCl₃/CH₃OH).

Rendement
: 80 %
Point de fusion
: 152 °C
Poids moléculaire
: 193 g
Formule brute
: C₁₀H₁₁NO₃
To a stirred solution of 0.05 mole of p-aminophenol in 50 ml of NaOH (3M), 15 ml of acetic anhydride and 5 to 10 g of crushed ice are rapidly added. Vigorous stirring is maintained for a few minutes. A beige precipitate appears which is collected and purified if necessary by chromatography (eluent CHCl₃ / CH₃OH).
Yield
: 80%
Fusion point
: 152 ° C
Molecular weight
: 193 g
Brute formula
: C₁₀H₁₁NO₃

L'analyse en résonance magnétique nucléaire et spectrométrie dans l'infrarouge révèle la formule développée de l'acétoxy-4 acétyl amino-1 benzène.Analysis of nuclear magnetic resonance and infrared spectrometry reveals the structural formula of 4-acetoxy-1-amino acetyl benzene.

Acétoxy-4 acétylamino-1 nitro-2 benzène4-acetoxy-1-acetylamino-2-nitro benzene

1,93 g de l'acétoxy-4 acétylamino-1 benzène obtenu (0,01 mole) sont ajoutés par petites portions sur 2 ml d'acide nitrique fumant ,agités à basse température (bain de glace + sel, T : 0 - 5 °C).1.93 g of 4-acetoxy-1-acetylamino benzene obtained (0.01 mole) are added in small portions to 2 ml of fuming nitric acid, stirred at low temperature (ice bath + salt, T: 0 - 5 ° C).

Durant 20-25 mn, le mélange réactionnel est ensuite maintenu à une température comprise entre 12 et 15 °C, puis versé sur de la glace pilée (hydrolyse).For 20-25 minutes, the reaction mixture is then maintained at a temperature between 12 and 15 ° C, then poured over crushed ice (hydrolysis).

Le solide jaune vif qui précipite est recueilli et recristallisé dans l'éthanol. Il est analysé par résonance magnétique nucléaire et par spectrométrie infrarouge en solution dans le chloroforme.

Figure imgb0004
The bright yellow solid which precipitates is collected and recrystallized from ethanol. It is analyzed by nuclear magnetic resonance and by infrared spectrometry in solution in chloroform.
Figure imgb0004

Acétoxy-4 acétylamino-1 amino-2 benzèneAcetoxy-4 acetylamino-1 amino-2 benzene

Un mélange comprenant 2,38 g de l'acétoxy-4 acétylamino-1 nitro-2 benzène obtenu (O,O1 mole), 6 ml de cyclohexène, du palladium sur charbon 10 % (en quantité catalytique) dans 20 ml d'éthanol, est porté à reflux sous atmosphère d'hydrogène durant une nuit.A mixture comprising 2.38 g of 4-acetoxy-1-acetylamino-2-nitro-benzene obtained (O, O1 mole), 6 ml of cyclohexene, palladium on carbon 10% (in catalytic amount) in 20 ml of ethanol , is brought to reflux under a hydrogen atmosphere overnight.

Le lendemain, on filtre à chaud sur célite afin d'éliminer le catalyseur. Au fur et à mesure que le filtrat refroidit, on observe l'apparition d'un précipité blanc qui est recueilli et purifié par recristallisation dans l'éthanol absolu. L'analyse par résonance magnétique nucléaire et infrarouge montre qu'il s'agit d'acétoxy-4 acétylamino-1 amino-2 benzène.

Rendement
: 64 %
Point de fusion
: 174 °C
Poids moléculaire
: 208 g
Formule brute
: C₁₀H₁₂N₂O₃
The next day, the mixture is filtered hot on celite in order to remove the catalyst. As the filtrate cools, a white precipitate is observed which is collected and purified by recrystallization from absolute ethanol. Analysis by nuclear and infrared magnetic resonance shows that it is 4-acetoxy-1-acetylamino-2 amino benzene.
Yield
: 64%
Fusion point
: 174 ° C
Molecular weight
: 208 g
Brute formula
: C₁₀H₁₂N₂O₃

Acétoxy-5 acétyl-1 benzotriazole5-acetoxy-1-acetyl benzotriazole

A une solution de 2,08 g d'acétoxy-4 acétylamino-1 amino-2 benzène (0,01 mole), 1,9 ml d'acide chlorhydrique concentré, 10 ml d'eau distillée, maintenue à 0 °C, on ajoute très lentement une solution de 0,7 g de nitrite de sodium NaNO₂ (0,01 mole) dans 2,7 ml d'eau distillée.To a solution of 2.08 g of 4-acetoxy-1-acetylamino-2 amino benzene (0.01 mole), 1.9 ml of concentrated hydrochloric acid, 10 ml of distilled water, kept at 0 ° C., a solution of 0.7 g of nitrite of sodium NaNO₂ (0.01 mole) in 2.7 ml of distilled water.

Un précipité orange se forme au fur et à mesure de l'addition. Il est recueilli, filtré et lavé à l'eau.

Rendement
: 94 %
Point de fusion
: 125 °C
Poids moléculaire
: 219 g
Formule brute
: C₁₀H₉N₃O₃
An orange precipitate forms as the addition takes place. It is collected, filtered and washed with water.
Yield
: 94%
Fusion point
: 125 ° C
Molecular weight
: 219 g
Brute formula
: C₁₀H₉N₃O₃

Chlorhydrate d'hydroxy-5 benzotriazoleBenzotriazole 5-hydroxy hydrochloride

On porte à reflux, jusqu'à complète solubilisation, un mélange de 2,19 g (0,01 mole) d'acétoxy-5 acétylbenzotriazole dans 7 ml d'acide chlorhydrique concentré.A mixture of 2.19 g (0.01 mole) of 5-acetoxyacetylbenzotriazole in 7 ml of concentrated hydrochloric acid is brought to reflux until complete solubilization.

La solution est ensuite refroidie à basse température (0 °C). Un précipité se forme qui est recueilli et lavé à l'eau distillée.

Rendement
: 65 %
Point de fusion
: 220 °C
(F littérature
: 225 °C)
Poids moléculaire
: 171,5 g
Formule brute
: C₆H₅N₃O
The solution is then cooled to low temperature (0 ° C). A precipitate forms which is collected and washed with distilled water.
Yield
: 65%
Fusion point
: 220 ° C
(F literature
: 225 ° C)
Molecular weight
: 171.5 g
Brute formula
: C₆H₅N₃O

Hydroxy-5 nitroso-4 benzotriazole5-hydroxy-4-nitroso benzotriazole

A une solution de 1,72 g (0,001 mole) de chlorhydrate d'hydroxy-5 benzotriazole dans 5 ml d'eau distillée, maintenue à 0 °C par un bain de glace sur sel, on ajoute en 15 mn un mélange de 0,69 g de NaNO₂ (O,001 mole) dans 5 ml d'eau distillée.To a solution of 1.72 g (0.001 mole) of 5-hydroxybenzotriazole hydrochloride in 5 ml of distilled water, maintained at 0 ° C. by an ice bath on salt, a mixture of 0 is added over 15 min. , 69 g of NaNO₂ (0.001 mole) in 5 ml of distilled water.

L'addition terminée, on poursuit l'agitation à basse température durant 1 heure.When the addition is complete, stirring is continued at low temperature for 1 hour.

Le solide jaune orangé qui s'est formé est ensuite filtré puis séché.

Rendement
: 95 %
Poids moléculaire
: 164 g
Formule brute
: C₆H₄N₄O₂
The orange-yellow solid that has formed is then filtered and dried.
Yield
: 95%
Molecular weight
: 164 g
Brute formula
: C₆H₄N₄O₂

2) Synthèse du triméthyl-indolino-spirobenzotriazolo-oxazine 2) Synthesis of trimethyl-indolino-spirobenzotriazolo-oxazine

On porte à reflux O,OO3 mole de la base indolinique de formule triméthyl-1,3,3 méthylène-2 indoline, dans 20 ml d'un solvant, constitué ici d'éthanol absolu. On ajoute lentement O,003 mole d'hydroxy-5 nitroso-4 benzotriazole en suspension dans 60 ml de solvant (addition en 1 h 30). Le reflux est poursuivi 2 h 30.O, OO3 mole of the indolinic base of formula trimethyl-1,3,3-methylene-2 indoline is brought to reflux in 20 ml of a solvent, constituted here of absolute ethanol. 0.003 mole of 5-hydroxy-4-nitroso-benzotriazole suspended in 60 ml of solvent is slowly added (addition in 1 hour 30 minutes). The reflux is continued for 2 h 30 min.

Au fur et à mesure de l'avancement de la réaction l'eau est éliminée avec le solvant par formation d'un azéotrope (montage avec un équipement Dean-Stark). On récupère en fin de réaction du produit nitrosé de départ n'ayant pas réagi, dans la proportion de 22 % en poids.As the reaction proceeds, the water is removed with the solvent by forming an azeotrope (assembly with Dean-Stark equipment). At the end of the reaction, unreacted starting nitrose product is recovered, in the proportion of 22% by weight.

Le produit obtenu est purifié par chromatographie sur silice dans un éluant constitué d'un mélange éther/acétate d'éthyle. Il répond à la formule développée II avec R¹ = R² = R³ étant tous trois - CH₃.

Poids moléculaire
: 319 g
Formule brute
: C₁₈H₁₇N₅O
The product obtained is purified by chromatography on silica in an eluent consisting of an ether / ethyl acetate mixture. It meets the structural formula II with R¹ = R² = R³ being all three - CH₃.
Molecular weight
: 319 g
Brute formula
: C₁₈H₁₇N₅O

EXEMPLE II :EXAMPLE II: Synthèse de l'isopropyl-diméthyl-indolino-spirobenzotriazole-oxazineSynthesis of isopropyl-dimethyl-indolino-spirobenzotriazole-oxazine

On applique la même procédure que dans l'exemple II pour provoquer la condensation du produit de l'exemple I avec la base indolinique isopropyl-1 méthylène-2 diméthyl-3,3 indoline.The same procedure is applied as in Example II to cause the condensation of the product of Example I with the indolin base isopropyl-1 methylene-2 dimethyl-3.3 indoline.

On obtient ainsi l'homologue isopropyldiméthyle présentant la formule II avec R¹ étant le radical isopropyle et R² et R³ étant tous deux le radical méthyle.

Figure imgb0005
This gives the isopropyldimethyl homolog having the formula II with R¹ being the isopropyl radical and R² and R³ both being the methyl radical.
Figure imgb0005

EXEMPLE IIIEXAMPLE III

On examine les propriétés photochromiques des composés dans les exemples I et II (cas où R⁶ = H).The photochromic properties of the compounds are examined in Examples I and II (case where R⁶ = H).

La technique utilisée procède par photolyse à éclairs et permet d'enregistrer le spectre d'absorption de la forme ouverte (photomérocyanine) dans la zone 400-650 nm, ainsi que son évolution au cours du temps.The technique used proceeds by flash photolysis and makes it possible to record the absorption spectrum of the open form (photomerocyanine) in the 400-650 nm zone, as well as its evolution over time.

On détermine ainsi :
Ao : densité optique maximum après photolyse,
KΔ : constante cinétique de décoloration (exprimée en s⁻¹), ainsi que les longueurs d'onde λe à l'épaulement et λmax au maximum d'absorption, exprimées en nanomètres.
We thus determine:
Ao: maximum optical density after photolysis,
K Δ : kinetic constant of discoloration (expressed in s⁻¹), as well as the wavelengths λe at the shoulder and λmax at the maximum of absorption, expressed in nanometers.

1) Mesures effectuées dans le toluène1) Measurements carried out in toluene

Les mesures sont effectuées à une température de 25 °C. L'énergie de photolyse sous 6 KV est d'environ 60 joules. Ao est donné pour une concentration de 2,5 x 10⁵ mole/l. On obtient les résultats suivants :
Composé de l'exemple I :
   - Ao = O,14,   KΔ = 0,17 s⁻¹.
Composé de l'exemple II :
   - Ao = 0,37,   KΔ = 0,18 s⁻¹.
The measurements are carried out at a temperature of 25 ° C. The photolysis energy at 6 KV is around 60 joules. Ao is given for a concentration of 2.5 x 10⁵ mole / l. The following results are obtained:
Composed of Example I:
- Ao = O, 14, K Δ = 0.17 s⁻¹.
Composed of Example II:
- Ao = 0.37, K Δ = 0.18 s⁻¹.

Les données des séries V et VI ci-après sont données à titre de comparaison avec l'état de la technique :

Figure imgb0006
Figure imgb0007
The following series V and VI data are given for comparison with the state of the art:
Figure imgb0006
Figure imgb0007

En choisissant le toluène pour solvant on obtient les longueurs d'onde caractéristiques suivantes extraites du spectre d'absorption :

  • Pour la série (V), la longueur d'onde correspondant à l'épaulement de la courbe (λe) est de 564 nm, la longueur d'onde maximale (λmax) correspondant à la valeur de longueur d'onde au maximum de l'absorption est de 594 nm ;
  • Pour la série (VI) : λe = 561 nm, λmax = 590 nm
  • Pour le composé de l'invention (avec R⁶ = H), soit :
    Figure imgb0008
    • lorsque R¹ = CH₃ : λe = 595 nm, λmax = 563 nm
    • lorsque R¹ = i-C₃H₇ : λe = 598 nm, λmax = 563 nm
By choosing toluene as solvent, the following characteristic wavelengths obtained are obtained of the absorption spectrum:
  • For the series (V), the wavelength corresponding to the shoulder of the curve (λe) is 564 nm, the maximum wavelength (λmax) corresponding to the value of wavelength at the maximum of l absorption is 594 nm;
  • For the series (VI): λe = 561 nm, λmax = 590 nm
  • For the compound of the invention (with R⁶ = H), either:
    Figure imgb0008
    • when R¹ = CH₃: λe = 595 nm, λmax = 563 nm
    • when R¹ = i-C₃H₇: λe = 598 nm, λmax = 563 nm

Pour les composés de l'art antérieur servant de référence, on constate que l'absorption maximum est obtenue pour la plus grande longueur d'onde alors que la situation est inverse pour le composé selon l'invention.For the compounds of the prior art serving as a reference, it can be seen that the maximum absorption is obtained for the longest wavelength while the situation is opposite for the compound according to the invention.

2) Influence du solvant2) Influence of the solvent

Les mesures sont effectuées successivement dans le cyclohexane (a), le toluène (b), le diméthyl-sulfoxyde (c).The measurements are carried out successively in cyclohexane (a), toluene (b), dimethyl sulfoxide (c).

On prend comme référence un composé connu qui est une spiro(indoline-phénanthrénoxazine) de formule :

Figure imgb0009

on obtient :

  • dans le solvant (a) : λe= 528 nm, λmax = 558 nm
  • dans le solvant (b) : λe = 538 nm, λmax = 574 nm
  • dans le solvant (c) : λe = 552 nm, λmax = 591 nm
We take as reference a known compound which is a spiro (indoline-phenanthrenoxazine) of formula:
Figure imgb0009

we obtain :
  • in the solvent (a): λe = 528 nm, λmax = 558 nm
  • in the solvent (b): λe = 538 nm, λmax = 574 nm
  • in the solvent (c): λe = 552 nm, λmax = 591 nm

Pour ce composé l'allure du spectre d'absorption de la forme ouverte est la même quel que soit le solvant.For this compound, the shape of the absorption spectrum of the open form is the same regardless of the solvent.

Par contre le composé selon l'invention possède un spectre d'absorption de sa forme ouverte présentant une sensibilité marquée à son environnement, en particulier ici le solvant. Le maximum d'absorption Ao correspond, dans les milieux apolaires aux faibles longueurs d'onde et inversement dans les milieux polaires (en particulier aprotique dipolaire).On the other hand, the compound according to the invention has an absorption spectrum of its open form exhibiting marked sensitivity to its environment, in particular here the solvent. The maximum absorption Ao corresponds, in apolar mediums to short wavelengths and vice versa in polar mediums (in particular dipolar aprotic).

Lorsque R₁ = i-C₃H₇, R₆ = H, R₂ = R₃, R₄ = R₅ = H (exemple II), on obtient :

  • dans le solvant (a) : λe = 595 nm, λmax = 563 nm
  • dans le solvant (b) : λe = 598 nm, λmax = 565 nm
  • dans le solvant (c) : λe = 569 nm, λmax = 604 nm
When R₁ = i-C₃H₇, R₆ = H, R₂ = R₃, R₄ = R₅ = H (example II), we obtain:
  • in the solvent (a): λe = 595 nm, λmax = 563 nm
  • in the solvent (b): λe = 598 nm, λmax = 565 nm
  • in the solvent (c): λe = 569 nm, λmax = 604 nm

On constate que, dans les solvants aprotiques dipolaires, le spectre obtenu après l'éclair de photolyse présente un maximum d'absorption à forte longueur d'onde puis évolue de façon inhabituelle. On observe un phénomène d'interconversion d'une durée de 250 ms dans le diméthylsulfoxyde à 25 °C qui se traduit progressivement par une inversion des bandes d'absorption.It is noted that, in dipolar aprotic solvents, the spectrum obtained after the flash of photolysis exhibits a maximum absorption at high wavelength and then evolves in an unusual manner. We observe an interconversion phenomenon lasting 250 ms in dimethyl sulfoxide at 25 ° C which gradually results in an inversion of the absorption bands.

Le nouveau spectre ainsi obtenu (comparable à celui enregistré en milieu apolaire) subit ensuite une décroissance dans le temps correspondant à une décoloration thermique classique.The new spectrum thus obtained (comparable to that recorded in an apolar medium) then undergoes a decrease over time corresponding to a conventional thermal discoloration.

Un tel phénomène (changement rapide du λmax suite à une excitation lumineuse) peut trouver des applications dans le domaine du stockage d'informations (mémoires d'ordinateur, disques optiques).Such a phenomenon (rapid change in λmax following light excitation) can find applications in the field of information storage (computer memories, optical discs).

Naturellement, l'invention n'est en rien limitée par les particularités qui ont été spécifiées dans les exemples qui précèdent ou par les détails des modes de mise en oeuvre particuliers choisis pour illustrer l'invention. Toutes sortes de variantes peuvent être apportées aux conditions opératoires de même qu'à la nature et aux proportions des constituants et réactifs sans sortir pour autant du cadre de l'invention.Naturally, the invention is in no way limited by the features which have been specified in the preceding examples or by the details of the particular modes of implementation chosen to illustrate the invention. All kinds of variations can be made to the operating conditions as well as to the nature and proportions of the constituents and reagents without departing from the scope of the invention.

Claims (13)

Nouveaux composés photochromiques de la famille des indolino-spiro-oxazines, caractérisés en ce qu'ils présentent la formule d'un indolinospiro-benzo-cyclodiazène.New photochromic compounds of the indolino-spiro-oxazine family, characterized in that they have the formula of an indolinospiro-benzo-cyclodiazene. Nouveaux composés suivant la revendication 1, caractérisés en ce que la partie oxazinique de la molécule comporte un cycle triaza orthocondensé sur un cycle aromatique.New compounds according to claim 1, characterized in that the oxazine part of the molecule comprises a triaza cycle orthocondensed on an aromatic cycle. Nouveaux composés suivant l'une quelconque des revendications 1 à 3, caractérisés en ce qu'ils comportent un groupement benzotriazole.New compounds according to any one of Claims 1 to 3, characterized in that they contain a benzotriazole group. Nouveaux composés suivant la revendication 1, caractérisés en ce qu'ils présentent la formule développée (II) :
Figure imgb0010
dans laquelle :
R⁶ est un atome d'hydrogène, un phényle, un radical alkyle, notamment un radical alkyle comportant de 1 à 5 atomes de carbone,
R¹ représente : i) un groupe alkyle de 1 à 8 atomes de carbone tel qu'un groupe méthyle, éthyle, n-propyle, isopropyle, n-butyle ; ii) un groupe allyle, phényle, arylalkyle tel qu'un groupe benzyle, phényle mono et di-substitué par des substituants du type alkyle ou alkoxy de 1 à 6 atomes de carbone ; iii) un groupe alicyclique tel qu'un groupe cyclohexyle éventuellement substitué ; iv) un groupe hydrocarbure aliphatique comportant dans sa chaîne un ou plusieurs hétéroatomes tels que O, N ou S, notamment une fonction acide, ester ou alcool. R² et R³ peuvent chacun et indépendamment l'un de l'autre représenter un groupe C₁₋₈ alkyle, phényle, phényle mono et disubstitué par des groupes C₁₋₄ alkyle et/ou C₁₋₅ alkoxy ou peuvent être combinés pour former une chaîne cyclique de 6 à 8 atomes de carbone (incluant le carbone spirannique 3 de l'hétérocycle indolinique) ;
New compounds according to claim 1, characterized in that they have the structural formula (II):
Figure imgb0010
in which :
R⁶ is a hydrogen atom, a phenyl, an alkyl radical, in particular an alkyl radical containing from 1 to 5 carbon atoms,
R¹ represents: i) an alkyl group of 1 to 8 carbon atoms such as a methyl, ethyl, n-propyl, isopropyl, n-butyl group; ii) an allyl, phenyl, arylalkyl group such as a benzyl, phenyl group mono and di-substituted by substituents of the alkyl or alkoxy type of 1 to 6 carbon atoms; iii) an alicyclic group such as an optionally substituted cyclohexyl group; iv) an aliphatic hydrocarbon group comprising in its chain one or more heteroatoms such as O, N or S, in particular an acid, ester or alcohol function. R² and R³ may each independently of one another represent a C₁₋₈ alkyl, phenyl, phenyl group mono and disubstituted by C₁₋₄ alkyl and / or C₁₋₅ alkoxy groups or may be combined to form a chain cyclic from 6 to 8 carbon atoms (including the spiranic carbon 3 of the indolinic heterocycle);
Nouveaux composés suivant l'une quelconque des revendications 1 à 4, caractérisés en ce que le radical R⁶ est un atome d'hydrogène.New compounds according to any one of Claims 1 to 4, characterized in that the radical R⁶ is a hydrogen atom. Nouveaux composés suivant l'une quelconque des revendications 1 à 5, caractérisés en ce qu'ils comportent de 1 à 4 substituants R⁴ sur le noyau phényle de la partie indolinique de la molécule et/ou 1 ou 2 substituants R⁵ sur le noyau phényle de la partie oxazinique, R⁴ et R⁵ pouvant chacun et indépendamment l'un de l'autre représenter : i) un atome d'hydrogène, une fonction amine NR′R˝, où R′ et R˝ représentent chacun et indépendamment un atome d'hydrogène, un groupe alkyle, cycloalkyle, phényle ou un dérivé substitué de celui-ci ; R′ et R˝ peuvent se combiner pour former un cycloalkyle pouvant être substitué et contenir un ou plusieurs hétéroatomes ; ii) un groupe R, OR, SR, COR ou COOR dans lequel R représente un atome d'hydrogène, un groupe alkyle de 1 à 6 atomes de carbone ou un groupe aryle ou hétéroaryle ; iii) un atome d'halogène, un groupe C₁₋₄ monohaloalkyle, un groupe C₁₋₄ polyhaloalkyle tel que CF₃, l'halogène étant notamment Cl, Br ; iv)-NO₂, CN, SCN,
chacun des substituants R⁴ pouvant être présent sur l'un quelconque des atomes de carbone convenables de la partie indoline du composé photochromique, en position 4, 5, 6 et 7, quand l'autre est un atome d'hydrogène, alors qu'il est préférable que deux substituants autres que H soientprésents en positions 4 et 5, 5 et 6, 4 et 6 ou 6 et 7.
New compounds according to any one of Claims 1 to 5, characterized in that they contain from 1 to 4 R⁴ substituents on the phenyl ring of the indolinic part of the molecule and / or 1 or 2 R⁵ substituents on the phenyl ring of the oxazine part, R⁴ and R⁵ can each and independently of one another represent: i) a hydrogen atom, an amine function NR′R˝, where R ′ and R˝ each independently represent a hydrogen atom, an alkyl, cycloalkyl, phenyl group or a substituted derivative thereof; R ′ and R˝ may combine to form a cycloalkyl which may be substituted and contain one or more heteroatoms; ii) a group R, OR, SR, COR or COOR in which R represents a hydrogen atom, an alkyl group of 1 to 6 carbon atoms or an aryl or heteroaryl group; iii) a halogen atom, a C₁₋₄ monohaloalkyl group, a C₁₋₄ polyhaloalkyl group such as CF₃, the halogen being in particular Cl, Br; iv) -NO₂, CN, SCN,
each of the substituents R⁴ possibly being present on any one of the suitable carbon atoms of the indoline part of the photochromic compound, in position 4, 5, 6 and 7, when the other is a hydrogen atom, whereas it East preferable that two substituents other than H are present in positions 4 and 5, 5 and 6, 4 and 6 or 6 and 7.
Nouveaux composés photochromiques suivant l'une des revendication 1 à 6, caractérisés en ce que : - R¹ est un groupe C₁₋₄ alkyle, phényle ou benzyle ; - R² et R³ sont choisis parmi les groupes C₁₋₅ alkyle tels que méthyle et éthyle ou un groupe phényle, ou sont combinés pour former un groupe cyclohexyle ; - chacun des groupes R⁴ est choisi parmi le groupe constitué par hydrogène, C₁₋₂ alkyle, chlore, fluor, brome, iode, C₁₋₂ trihaloalkyle et C₁₋₅ alkoxy ; - et R⁵ est un atome d'hydrogène ou un groupe C₁₋₄ alkoxy ou une amine tertiaire ou un halogène. New photochromic compounds according to one of Claims 1 to 6, characterized in that: - R¹ is a C₁₋₄ alkyl, phenyl or benzyl group; - R² and R³ are chosen from C₁₋₅ alkyl groups such as methyl and ethyl or a phenyl group, or are combined to form a cyclohexyl group; each of the groups R⁴ is chosen from the group consisting of hydrogen, C₁₋₂ alkyl, chlorine, fluorine, bromine, iodine, C₁₋₂ trihaloalkyle and C₁₋₅ alkoxy; - And R⁵ is a hydrogen atom or a C₁₋₄ alkoxy group or a tertiary amine or a halogen. Nouveaux composés photochromiques suivant l'une quelconque des revendications 1 à 7, caractérisés en ce que : - R¹ est un groupe méthyle ou isopropyle ; - R² et R² représentent chacun et indépendamment l'un de l'autre un groupe méthyle ; New photochromic compounds according to any one of Claims 1 to 7, characterized in that: - R¹ is a methyl or isopropyl group; - R² and R² each represent, independently of one another, a methyl group; Nouveaux composés photochromiques suivant l'une quelconque des revendications 1 à 8, caractérisés en ce que la partie indolinique de la molécule comporte un substituant nitro sur le groupement indoline, notamment en position 5.New photochromic compounds according to any one of Claims 1 to 8, characterized in that the indolinic part of the molecule contains a nitro substituent on the indoline group, in particular in position 5. Nouveaux composés photochromiques suivant la revendication 9, caractérisés en ce qu'ils présentent la formule générale (II) de la revendication 4, dans laquelle le radical R⁴ est -NO₂ en position 5.New photochromic compounds according to claim 9, characterized in that they have the general formula (II) of claim 4, in which the radical R⁴ is -NO₂ in position 5. Compositions photochromiques pour lentilles optiques contenant au moins un des composés suivant l'une quelconque des revendications 1 à 10, en proportion photochromique.Photochromic compositions for optical lenses containing at least one of the compounds according to any one of Claims 1 to 10, in photochromic proportion. Procédé de préparation des composés selon l'une quelconque des revendications 1 à 10, caractérisé en ce qu'il comporte une étape de condensation d'une base indolinique III sur un composé nitroso-hydroxy-hétéroaromatique IV, suivant le schéma :
Figure imgb0011
Process for the preparation of the compounds according to any one of Claims 1 to 10, characterized in what it includes a stage of condensation of an indolinic base III on a nitroso-hydroxy-heteroaromatic compound IV, according to the scheme:
Figure imgb0011
Procédé suivant la revendication 12, caractérisé en ce que le composé nitroso-hydroxy-héteroaromatique est l'hydroxy-5 nitroso-4 benzotriazole obtenu par nitrosation d'un dérivé hydroxy résultant de l'hydrolyse d'un derivé obtenu à partir du para-aminophénol par des étapes successives d'acétylation, nitration, réduction catalytique transformant NO₂ en NH₂, et condensation pour former le cycle triazolique.Process according to Claim 12, characterized in that the nitroso-hydroxy-heteroaromatic compound is 5-hydroxy-4-nitroso benzotriazole obtained by nitrosation of a hydroxy derivative resulting from the hydrolysis of a derivative obtained from para- aminophenol by successive stages of acetylation, nitration, catalytic reduction transforming NO₂ into NH₂, and condensation to form the triazolic cycle.
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